Terrytown, Louisianna 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

418
FXUS64 KLIX 261047
AFDLIX

Area Forecast Discussion
National Weather Service New Orleans LA
547 AM CDT Thu Mar 26 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 533 AM CDT Thu Mar 26 2026

- Patchy to areas of dense fog possible again this morning. A
  Dense Fog Advisory is in effect for portions of the area
  overnight.

- Above normal temperatures will be in place through Friday,
  possibly even record breaking temperatures.

- No significant rainfall in the forecast until at least early
  next week.

- Critical Fire Weather concerns possible Saturday behind the cold
  front.

&&

.UPDATE...
Issued at 440 AM CDT Thu Mar 26 2026

Added Jackson County to the Dense Fog Advisory. Yes there is a
break in the advisory across the region and if you glance at the
satellite you can see why. Thick stratus layer developed overnight
and is keeping much of the area between Pascagoula and Baton Rouge
void of much more than very light BR (visibilities around 5-6 sm).
The stratus development made a lot of sense with the winds HDC VWP
was showing till about 7z. Winds at the first and second gate
were anywhere from 20-30 kts most of the evening and just past
midnight but has sense been relaxing and as of 929z was down to 10
kt. Watching this closely because this may allow that stratus deck
to settle down to the sfc quickly leading to widespread fog and
even dense fog. That said it is a rather thick area of stratus so
it won`t be fast to crash unlike a thinner layer would. In
addition the stratus deck continues to build and spread across the
area including on top of areas that have had fog develop and this
could have impacts on dissipated speed as it would likely slow
things down allowing fog to hold on a little longer this morning.
As for the marsh fire in the Bonnet Carre Spillway, not seeing any
significant impacts from it and before the stratus starts to build
in overhead we couldn`t really see any sign of it on satellite
anymore. LADOTD camera`s along I-10 across the spillway are
showing increasing mist/light fog but no dense fog yet in that
area. All products are already issued. /CAB/

&&

.SHORT TERM...
(Today through Friday)
Issued at 158 AM CDT Thu Mar 26 2026

There are some impacts in the short term but overall not a lot of
issues. Obviously fog is the immediate forecast problem. A Dense
Fog Advisory Short advisory remains out of the River and Bayou
parishes however, fog has had a difficult time developing so far.
WE are warmer this morning than yesterday so that is a negative
for fog and looking at the KHDC VWP winds all most of the night
have been in the 25 to 30 kt range at the first gate. That is not
favorable for fog and would suggest mostly low stratus and looking
at GOES right now that has absolutely been the case for much of
the northern half of the area. But the winds have recently been
relaxing some so those low clouds could begin to build down
towards the surface leading to a more substantial fog concern.
Fog does appear to have the greatest potential of developing in
the current advisory area but also portions of coastal MS. We are
currently monitoring a marsh fire in the Bonnet Carre` Spillway
and if we get fig to develop this could lead to Super Fog concerns
along I-10 which would lead to visibilities near zero. Not seeing
much in the way of problems right now but we will closely monitor
the situation with satellite and road cameras.

After the sun comes up conditions should quickly improve given
high pressure dominating the region. The sfc high will be centered
off to the ENE leading to return flow at sfc and LL. The ridge in
the mid lvls will continue to build east today and tomorrow
leading to increasing hghts, warmer LL temps, and stronger
subsidence. With that we will see more widespread mid 80s with a
few upper 80s tossed in there.

The next forecast concern comes into play Saturday. A s/w moving
through the 4 corners region today will ride over top of the
ridge tonight and tomorrow. This will help to erode the eastern
periphery of the ridge some Friday and Friday night and then usher
a cold front across the area Friday night. Not really much in the
way of cold air coming down but it will bring much drier air
behind it. The other negative aspect is that this front will be
rain free which is only going to help exacerbate the drought
across the region. One last thing, winds will also ramp up behind
the front with moderate to strong northerly winds quickly
developing after sunrise and remaining moderate to strong into the
early afternoon hours before quickly relaxing. All of this is
leading to some concern of potential critical fire weather
conditions Saturday. For more information on the potential for
critical fire weather conditions refer to the Fire Weather section
below. /CAB/

&&

.LONG TERM...
(Saturday night through Wednesday)
Issued at 158 AM CDT Thu Mar 26 2026

There`s really not been much change in the expected upper pattern in
the last 24 hours, and the earlier discussion pretty much remains
valid.

The global models are in good agreement that a shortwave trough
diving into the Mid-Atlantic states will help to slightly erode a
strong H5 ridge axis extending eastward across the Gulf South from
Texas and the Four Corners region over the weekend. A front will
accompany this shortwave feature, but this front will be moisture
starved as it moves through the area. It should already be offshore
by Saturday morning. The boundary is likely to already be returning
northward on Sunday as the surface high shifts east of the area.
Can`t entirely rule out a few showers on Sunday, but they won`t
amount to much as far as accumulation goes, less than a tenth of an
inch, if it rains at all. Little in the way of cold air advection is
expected with this front, and temperatures will only fall back to
average for late March with highs in the mid to upper 70s Saturday
and Sunday with lows in the 50s and lower 60s.  As noted in the fire
weather section, there is potential for fire weather impacts on
Saturday if winds are a little stronger than expected.

As the shortwave pulls away, the strong H5 ridge will once again
become the primary feature impacting our weather at the start of
next week.  With increased drying and warming aloft, temperatures
will once again turn warmer than average with daytime highs rising
into the low to mid 80s and lows falling into the 60s.  A
strengthening mid-level inversion will keep most cloud development
suppressed, but there will be enough moisture and instability
beneath the inversion to produce scattered cumulus development each
afternoon from Monday onward. Not much more than 20-30 percent
coverage at most, and anything more than one-quarter inch
accumulation on any day would be a surprise right now. A majority of
the area may not see any rainfall in the next week. /RW/

&&

.AVIATION...
(12Z TAFS)
Issued at 533 AM CDT Thu Mar 26 2026

All terminals except MSY are now dealing with impacts from either
vsbys, cigs, or both. BTR the last terminal to see impacts just
tanked in the last 30 mins and is now dealing with 1/4sm and
VV003. Large area of stratus develop during the late evening and
early overnight hours across much of the area north of the I-10/12
corridor east of BTR and west of PQL. This stratus deck has just
continued to get thicker and spread south and southwest now and
will likely hang around a little longer than expected. It is
mainly around 1300 to 2300 ft off the deck. However, the locations
that area dealing with fog and at this time it is mainly PQL and
BTR which stayed out from under the stratus the longest are now
showing cigs around 300-800 ft. between 15 and 16z all terminals
should at the least be back in MVFR status if not VFR. As for
overnight tonight and early tomorrow morning additional impacts
are expected once again. /CAB/

&&

.MARINE...
Issued at 158 AM CDT Thu Mar 26 2026

High pressure is back in control over the area with generally light
and variable winds. Once the surface high becomes centered east of
the area this morning winds will take more of an onshore direction
and will remain onshore until Friday night. The next front will move
through the region late Friday night and immediately behind this
front winds will quickly shift to offshore. Winds will also increase
across all of the coastal waters to around 20 to 25 kts and higher
gusts. This would necessitate Small Craft Advisory headlines for all
waters. Even though this is 48 to 60 hours out confidence is rather
high in the forecast. The strong winds will not last long as the
pressure gradient quickly relaxes and we will see onshore return
possibly as early as late Sunday morning. /CAB/

&&

.FIRE WEATHER...
Issued at 158 AM CDT Thu Mar 26 2026

There is the potential for critical fire weather conditions to
develop during a short window Saturday morning through the
afternoon. As the cold front moves through Friday night, much
drier air will quickly filter in behind it along with moderate to
strong northerly winds developing. Currently the forecast is
advertising min RH values in the mid 20 to near 30 percent range
north of the 10/12 corridor. The concern is typically models and
especially the MOS guidance really struggle with the amount of
mixing/drying behind these early Spring fronts which would suggest
the min RH values could be lower. As for winds, we are looking at
sustained winds of 15 to 20 mph with higher gusts during the
morning and through midday before relaxing through the afternoon.
Combine the low RH values and strong winds with the lack of
rainfall and continued drought we are experiencing and the
potential is there for dangerous fire weather conditions to
develop. We may need a Red Flag Warning/Fire Weather Watch for the
northern half of the area. Luckily this is a small window as we
will quickly start to recover on Sunday. /CAB/

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Dense Fog Advisory until 10 AM CDT this morning for LAZ034-035-
     046>048-056>060-065>067-085-086.

GM...Small Craft Advisory from 4 AM to 4 PM CDT Saturday for GMZ530-
     532-534-536-538-550-552-555-557-570-572-575-577.

MS...Dense Fog Advisory until 10 AM CDT this morning for MSZ085-088.

GM...Small Craft Advisory from 4 AM to 4 PM CDT Saturday for GMZ532-
     534-536-538-550-552-555-557-570-572-575-577.

&&

$$

SHORT TERM...CAB
LONG TERM....RW
AVIATION...CAB
MARINE...CAB